The cryogenic infrared target is a device used to correct the response linearity and non uniformity of infrared products
(detector). Cryogenic infrared target needs wide temperature variation range as well as a stable and uniform temperature
distribution in a larger area. The cryogenic infrared target also demands other excellent performances such as high
temperature control precision and faster rate of temperature change. This paper discuss and analysis the working
principle and key technology of the cryogenic infrared target. The analysis and test results showed that temperature of
the divice can change from 80K to 300K and temperature uniformity was less than 0.2K and temperature precision was
less than 0.2K and temperature stability was less than 0.2K/min. The structure of cryogenic infrared target was designed
reasonably. Its index meets the design requirement.